SPL Phonitor XE headphone amplifier is a high-end headphone amplifier hand-made in Germany. It features Phonitor Matrix technology, Volume remote control, retro looking VU meters, premium DA converter and the superior VOLTAiR technology to make the Phonitor xe one of the best headphone amplifiers available today. The Phonitor xe offers connections for a standard headphone with a stereo jack plug and for balanced-driven headphones using a 4-pol XLR jack. With enormous output power, every set of headphones can be driven effortlessly. Phonitor xe accepts almost all audio connections, balanced via XLR or unbalanced via RCA connectors. With the optional DAC, four additional digital sources can be added. From USB to the professional AES format, everything is accommodated for.